package com.niu.service.impl;

import com.github.pagehelper.Page;
import com.github.pagehelper.PageHelper;
import com.niu.constant.MessageConstant;
import com.niu.constant.StatusConstant;
import com.niu.dto.EmployeeDTO;
import com.niu.dto.EmployeeLoginDTO;
import com.niu.dto.EmployeePageQueryDTO;
import com.niu.entity.Employee;
import com.niu.exception.AccountLockedException;
import com.niu.exception.AccountNotFoundException;
import com.niu.exception.PasswordErrorException;
import com.niu.mapper.EmployeeMapper;
import com.niu.result.PageResult;
import com.niu.service.EmployeeService;
import com.niu.vo.EditPasswordVO;
import org.springframework.beans.BeanUtils;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Service;

import java.util.List;

@Service
public class EmployeeServiceImpl implements EmployeeService {

    @Autowired
    private EmployeeMapper employeeMapper;

    /**
     * 员工登录
     *
     * @param employeeLoginDTO
     * @return
     */
    public Employee login(EmployeeLoginDTO employeeLoginDTO) {
        String username = employeeLoginDTO.getUsername();
        String password = employeeLoginDTO.getPassword();

        //1、根据用户名查询数据库中的数据
        Employee employee = employeeMapper.getByUsername(username);

        //2、处理各种异常情况（用户名不存在、密码不对、账号被锁定）
        if (employee == null) {
            //账号不存在
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }

        //密码比对
        // TODO 后期需要进行md5加密，然后再进行比对
        if (!password.equals(employee.getPassword())) {
            //密码错误
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }

        if (employee.getStatus() == StatusConstant.DISABLE) {
            //账号被锁定
            throw new AccountLockedException(MessageConstant.ACCOUNT_LOCKED);
        }

        //3、返回实体对象
        return employee;
    }

    /**
     * 新增员工
     * @param employeeDTO
     */
    @Override
    public void save(EmployeeDTO employeeDTO) {
        Employee emplyee = new Employee();

        //对象属性拷贝
        BeanUtils.copyProperties(employeeDTO, emplyee);

        //状态，1正常，0锁定
        emplyee.setStatus(StatusConstant.ENABLE);

        //设置密码,默认
        emplyee.setPassword(emplyee.getPassword());

        employeeMapper.insert(emplyee);
    }

    /**
     * 分页查询
     * @param employeePageQueryDTO
     * @return
     */
    @Override
    public PageResult pageQuery(EmployeePageQueryDTO employeePageQueryDTO) {
        // select * from employee limit 0,10
        //通过底层mysql实现分页查询
        PageHelper.startPage(employeePageQueryDTO.getPage(),employeePageQueryDTO.getPageSize());

        Page<Employee> page = employeeMapper.pageQuery(employeePageQueryDTO);
        long total = page.getTotal();
        List<Employee> records = page.getResult();
        return new PageResult(total, (List) records);
    }

    /**
     * 启用禁用员工账号
     * @param status
     * @param id
     */
    @Override
    public void startOrStop(Integer status, Long id) {
        //update employee

        /*Employee employee = new Employee();
        employee.setStatus(status);
        employee.setId(id);
        */

        Employee employee = Employee.builder()
                .status(status)
                .id(id)
                .build();

        employeeMapper.update(employee);
    }

    /**
     * 根据id查询员工信息
     * @param id
     * @return
     */
    @Override
    public Employee getById(Long id) {
        Employee employee =  employeeMapper.getByID(id);
        employee.setPassword("*******");
        return employee;
    }

    /**
     * 编辑员工信息
     * @param employeeDTO
     */
    @Override
    public void update(EmployeeDTO employeeDTO) {
        Employee employee = new Employee();
        BeanUtils.copyProperties(employeeDTO, employee);

//        employee.setUpdateTime(LocalDateTime.now());
//        employee.setUpdateUser(BaseContext.getCurrentId());

        employeeMapper.update(employee);
    }

    /**
     * 根据id删除员工
     * @param id
     */
    @Override
    public void deleteById(Long id) {
        employeeMapper.deletde(id);
    }

    /**
     * 修改密码
     * @param editPasswordVO
     */
    @Override
    public void editPassword(EditPasswordVO editPasswordVO) {
        //寻找用户是否存在
        Employee employee = employeeMapper.getByID(editPasswordVO.getEmpId());
        if(employee == null){
            throw new AccountNotFoundException(MessageConstant.ACCOUNT_NOT_FOUND);
        }
        if(!employee.getPassword().equals(editPasswordVO.getOldPassword())){
            throw new PasswordErrorException(MessageConstant.PASSWORD_ERROR);
        }
        employee.setPassword(editPasswordVO.getNewPassword());
        employeeMapper.update(employee);
    }


}
